Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 1 | /* |
Bryan O'Sullivan | 759d576 | 2006-07-01 04:35:49 -0700 | [diff] [blame] | 2 | * Copyright (c) 2006 QLogic, Inc. All rights reserved. |
Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 3 | * Copyright (c) 2006 PathScale, Inc. All rights reserved. |
| 4 | * |
| 5 | * This software is available to you under a choice of one of two |
| 6 | * licenses. You may choose to be licensed under the terms of the GNU |
| 7 | * General Public License (GPL) Version 2, available from the file |
| 8 | * COPYING in the main directory of this source tree, or the |
| 9 | * OpenIB.org BSD license below: |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or |
| 12 | * without modification, are permitted provided that the following |
| 13 | * conditions are met: |
| 14 | * |
| 15 | * - Redistributions of source code must retain the above |
| 16 | * copyright notice, this list of conditions and the following |
| 17 | * disclaimer. |
| 18 | * |
| 19 | * - Redistributions in binary form must reproduce the above |
| 20 | * copyright notice, this list of conditions and the following |
| 21 | * disclaimer in the documentation and/or other materials |
| 22 | * provided with the distribution. |
| 23 | * |
| 24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 31 | * SOFTWARE. |
| 32 | */ |
| 33 | |
| 34 | #include <linux/version.h> |
Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 35 | #include <linux/module.h> |
| 36 | #include <linux/fs.h> |
| 37 | #include <linux/mount.h> |
| 38 | #include <linux/pagemap.h> |
| 39 | #include <linux/init.h> |
| 40 | #include <linux/namei.h> |
| 41 | #include <linux/pci.h> |
| 42 | |
| 43 | #include "ipath_kernel.h" |
| 44 | |
| 45 | #define IPATHFS_MAGIC 0x726a77 |
| 46 | |
| 47 | static struct super_block *ipath_super; |
| 48 | |
| 49 | static int ipathfs_mknod(struct inode *dir, struct dentry *dentry, |
| 50 | int mode, struct file_operations *fops, |
| 51 | void *data) |
| 52 | { |
| 53 | int error; |
| 54 | struct inode *inode = new_inode(dir->i_sb); |
| 55 | |
| 56 | if (!inode) { |
| 57 | error = -EPERM; |
| 58 | goto bail; |
| 59 | } |
| 60 | |
| 61 | inode->i_mode = mode; |
| 62 | inode->i_uid = 0; |
| 63 | inode->i_gid = 0; |
Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 64 | inode->i_blocks = 0; |
| 65 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
Theodore Ts'o | 8e18e29 | 2006-09-27 01:50:46 -0700 | [diff] [blame] | 66 | inode->i_private = data; |
Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 67 | if ((mode & S_IFMT) == S_IFDIR) { |
| 68 | inode->i_op = &simple_dir_inode_operations; |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 69 | inc_nlink(inode); |
| 70 | inc_nlink(dir); |
Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | inode->i_fop = fops; |
| 74 | |
| 75 | d_instantiate(dentry, inode); |
| 76 | error = 0; |
| 77 | |
| 78 | bail: |
| 79 | return error; |
| 80 | } |
| 81 | |
| 82 | static int create_file(const char *name, mode_t mode, |
| 83 | struct dentry *parent, struct dentry **dentry, |
| 84 | struct file_operations *fops, void *data) |
| 85 | { |
| 86 | int error; |
| 87 | |
| 88 | *dentry = NULL; |
| 89 | mutex_lock(&parent->d_inode->i_mutex); |
| 90 | *dentry = lookup_one_len(name, parent, strlen(name)); |
| 91 | if (!IS_ERR(dentry)) |
| 92 | error = ipathfs_mknod(parent->d_inode, *dentry, |
| 93 | mode, fops, data); |
| 94 | else |
| 95 | error = PTR_ERR(dentry); |
| 96 | mutex_unlock(&parent->d_inode->i_mutex); |
| 97 | |
| 98 | return error; |
| 99 | } |
| 100 | |
| 101 | static ssize_t atomic_stats_read(struct file *file, char __user *buf, |
| 102 | size_t count, loff_t *ppos) |
| 103 | { |
| 104 | return simple_read_from_buffer(buf, count, ppos, &ipath_stats, |
| 105 | sizeof ipath_stats); |
| 106 | } |
| 107 | |
| 108 | static struct file_operations atomic_stats_ops = { |
| 109 | .read = atomic_stats_read, |
| 110 | }; |
| 111 | |
| 112 | #define NUM_COUNTERS sizeof(struct infinipath_counters) / sizeof(u64) |
| 113 | |
| 114 | static ssize_t atomic_counters_read(struct file *file, char __user *buf, |
| 115 | size_t count, loff_t *ppos) |
| 116 | { |
| 117 | u64 counters[NUM_COUNTERS]; |
| 118 | u16 i; |
| 119 | struct ipath_devdata *dd; |
| 120 | |
Theodore Ts'o | 8e18e29 | 2006-09-27 01:50:46 -0700 | [diff] [blame] | 121 | dd = file->f_dentry->d_inode->i_private; |
Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 122 | |
| 123 | for (i = 0; i < NUM_COUNTERS; i++) |
| 124 | counters[i] = ipath_snap_cntr(dd, i); |
| 125 | |
| 126 | return simple_read_from_buffer(buf, count, ppos, counters, |
| 127 | sizeof counters); |
| 128 | } |
| 129 | |
| 130 | static struct file_operations atomic_counters_ops = { |
| 131 | .read = atomic_counters_read, |
| 132 | }; |
| 133 | |
| 134 | static ssize_t atomic_node_info_read(struct file *file, char __user *buf, |
| 135 | size_t count, loff_t *ppos) |
| 136 | { |
| 137 | u32 nodeinfo[10]; |
| 138 | struct ipath_devdata *dd; |
| 139 | u64 guid; |
| 140 | |
Theodore Ts'o | 8e18e29 | 2006-09-27 01:50:46 -0700 | [diff] [blame] | 141 | dd = file->f_dentry->d_inode->i_private; |
Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 142 | |
| 143 | guid = be64_to_cpu(dd->ipath_guid); |
| 144 | |
| 145 | nodeinfo[0] = /* BaseVersion is SMA */ |
| 146 | /* ClassVersion is SMA */ |
| 147 | (1 << 8) /* NodeType */ |
| 148 | | (1 << 0); /* NumPorts */ |
| 149 | nodeinfo[1] = (u32) (guid >> 32); |
| 150 | nodeinfo[2] = (u32) (guid & 0xffffffff); |
| 151 | /* PortGUID == SystemImageGUID for us */ |
| 152 | nodeinfo[3] = nodeinfo[1]; |
| 153 | /* PortGUID == SystemImageGUID for us */ |
| 154 | nodeinfo[4] = nodeinfo[2]; |
| 155 | /* PortGUID == NodeGUID for us */ |
| 156 | nodeinfo[5] = nodeinfo[3]; |
| 157 | /* PortGUID == NodeGUID for us */ |
| 158 | nodeinfo[6] = nodeinfo[4]; |
| 159 | nodeinfo[7] = (4 << 16) /* we support 4 pkeys */ |
| 160 | | (dd->ipath_deviceid << 0); |
| 161 | /* our chip version as 16 bits major, 16 bits minor */ |
| 162 | nodeinfo[8] = dd->ipath_minrev | (dd->ipath_majrev << 16); |
| 163 | nodeinfo[9] = (dd->ipath_unit << 24) | (dd->ipath_vendorid << 0); |
| 164 | |
| 165 | return simple_read_from_buffer(buf, count, ppos, nodeinfo, |
| 166 | sizeof nodeinfo); |
| 167 | } |
| 168 | |
| 169 | static struct file_operations atomic_node_info_ops = { |
| 170 | .read = atomic_node_info_read, |
| 171 | }; |
| 172 | |
| 173 | static ssize_t atomic_port_info_read(struct file *file, char __user *buf, |
| 174 | size_t count, loff_t *ppos) |
| 175 | { |
| 176 | u32 portinfo[13]; |
| 177 | u32 tmp, tmp2; |
| 178 | struct ipath_devdata *dd; |
| 179 | |
Theodore Ts'o | 8e18e29 | 2006-09-27 01:50:46 -0700 | [diff] [blame] | 180 | dd = file->f_dentry->d_inode->i_private; |
Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 181 | |
| 182 | /* so we only initialize non-zero fields. */ |
| 183 | memset(portinfo, 0, sizeof portinfo); |
| 184 | |
| 185 | /* |
| 186 | * Notimpl yet M_Key (64) |
| 187 | * Notimpl yet GID (64) |
| 188 | */ |
| 189 | |
| 190 | portinfo[4] = (dd->ipath_lid << 16); |
| 191 | |
| 192 | /* |
Bryan O'Sullivan | 0fd4136 | 2006-08-25 11:24:34 -0700 | [diff] [blame] | 193 | * Notimpl yet SMLID. |
| 194 | * CapabilityMask is 0, we don't support any of these |
Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 195 | * DiagCode is 0; we don't store any diag info for now Notimpl yet |
| 196 | * M_KeyLeasePeriod (we don't support M_Key) |
| 197 | */ |
| 198 | |
| 199 | /* LocalPortNum is whichever port number they ask for */ |
| 200 | portinfo[7] = (dd->ipath_unit << 24) |
| 201 | /* LinkWidthEnabled */ |
| 202 | | (2 << 16) |
| 203 | /* LinkWidthSupported (really 2, but not IB valid) */ |
| 204 | | (3 << 8) |
| 205 | /* LinkWidthActive */ |
| 206 | | (2 << 0); |
| 207 | tmp = dd->ipath_lastibcstat & IPATH_IBSTATE_MASK; |
| 208 | tmp2 = 5; |
| 209 | if (tmp == IPATH_IBSTATE_INIT) |
| 210 | tmp = 2; |
| 211 | else if (tmp == IPATH_IBSTATE_ARM) |
| 212 | tmp = 3; |
| 213 | else if (tmp == IPATH_IBSTATE_ACTIVE) |
| 214 | tmp = 4; |
| 215 | else { |
| 216 | tmp = 0; /* down */ |
| 217 | tmp2 = tmp & 0xf; |
| 218 | } |
| 219 | |
| 220 | portinfo[8] = (1 << 28) /* LinkSpeedSupported */ |
| 221 | | (tmp << 24) /* PortState */ |
| 222 | | (tmp2 << 20) /* PortPhysicalState */ |
| 223 | | (2 << 16) |
| 224 | |
| 225 | /* LinkDownDefaultState */ |
| 226 | /* M_KeyProtectBits == 0 */ |
| 227 | /* NotImpl yet LMC == 0 (we can support all values) */ |
| 228 | | (1 << 4) /* LinkSpeedActive */ |
| 229 | | (1 << 0); /* LinkSpeedEnabled */ |
| 230 | switch (dd->ipath_ibmtu) { |
| 231 | case 4096: |
| 232 | tmp = 5; |
| 233 | break; |
| 234 | case 2048: |
| 235 | tmp = 4; |
| 236 | break; |
| 237 | case 1024: |
| 238 | tmp = 3; |
| 239 | break; |
| 240 | case 512: |
| 241 | tmp = 2; |
| 242 | break; |
| 243 | case 256: |
| 244 | tmp = 1; |
| 245 | break; |
| 246 | default: /* oops, something is wrong */ |
| 247 | ipath_dbg("Problem, ipath_ibmtu 0x%x not a valid IB MTU, " |
| 248 | "treat as 2048\n", dd->ipath_ibmtu); |
| 249 | tmp = 4; |
| 250 | break; |
| 251 | } |
| 252 | portinfo[9] = (tmp << 28) |
| 253 | /* NeighborMTU */ |
| 254 | /* Notimpl MasterSMSL */ |
| 255 | | (1 << 20) |
| 256 | |
| 257 | /* VLCap */ |
| 258 | /* Notimpl InitType (actually, an SMA decision) */ |
| 259 | /* VLHighLimit is 0 (only one VL) */ |
| 260 | ; /* VLArbitrationHighCap is 0 (only one VL) */ |
| 261 | portinfo[10] = /* VLArbitrationLowCap is 0 (only one VL) */ |
| 262 | /* InitTypeReply is SMA decision */ |
| 263 | (5 << 16) /* MTUCap 4096 */ |
| 264 | | (7 << 13) /* VLStallCount */ |
| 265 | | (0x1f << 8) /* HOQLife */ |
| 266 | | (1 << 4) |
| 267 | |
| 268 | /* OperationalVLs 0 */ |
| 269 | /* PartitionEnforcementInbound */ |
| 270 | /* PartitionEnforcementOutbound not enforced */ |
| 271 | /* FilterRawinbound not enforced */ |
| 272 | ; /* FilterRawOutbound not enforced */ |
| 273 | /* M_KeyViolations are not counted by hardware, SMA can count */ |
| 274 | tmp = ipath_read_creg32(dd, dd->ipath_cregs->cr_errpkey); |
| 275 | /* P_KeyViolations are counted by hardware. */ |
| 276 | portinfo[11] = ((tmp & 0xffff) << 0); |
| 277 | portinfo[12] = |
| 278 | /* Q_KeyViolations are not counted by hardware */ |
| 279 | (1 << 8) |
| 280 | |
| 281 | /* GUIDCap */ |
| 282 | /* SubnetTimeOut handled by SMA */ |
| 283 | /* RespTimeValue handled by SMA */ |
| 284 | ; |
| 285 | /* LocalPhyErrors are programmed to max */ |
| 286 | portinfo[12] |= (0xf << 20) |
| 287 | | (0xf << 16) /* OverRunErrors are programmed to max */ |
| 288 | ; |
| 289 | |
| 290 | return simple_read_from_buffer(buf, count, ppos, portinfo, |
| 291 | sizeof portinfo); |
| 292 | } |
| 293 | |
| 294 | static struct file_operations atomic_port_info_ops = { |
| 295 | .read = atomic_port_info_read, |
| 296 | }; |
| 297 | |
| 298 | static ssize_t flash_read(struct file *file, char __user *buf, |
| 299 | size_t count, loff_t *ppos) |
| 300 | { |
| 301 | struct ipath_devdata *dd; |
| 302 | ssize_t ret; |
| 303 | loff_t pos; |
| 304 | char *tmp; |
| 305 | |
| 306 | pos = *ppos; |
| 307 | |
| 308 | if ( pos < 0) { |
| 309 | ret = -EINVAL; |
| 310 | goto bail; |
| 311 | } |
| 312 | |
| 313 | if (pos >= sizeof(struct ipath_flash)) { |
| 314 | ret = 0; |
| 315 | goto bail; |
| 316 | } |
| 317 | |
| 318 | if (count > sizeof(struct ipath_flash) - pos) |
| 319 | count = sizeof(struct ipath_flash) - pos; |
| 320 | |
| 321 | tmp = kmalloc(count, GFP_KERNEL); |
| 322 | if (!tmp) { |
| 323 | ret = -ENOMEM; |
| 324 | goto bail; |
| 325 | } |
| 326 | |
Theodore Ts'o | 8e18e29 | 2006-09-27 01:50:46 -0700 | [diff] [blame] | 327 | dd = file->f_dentry->d_inode->i_private; |
Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 328 | if (ipath_eeprom_read(dd, pos, tmp, count)) { |
| 329 | ipath_dev_err(dd, "failed to read from flash\n"); |
| 330 | ret = -ENXIO; |
| 331 | goto bail_tmp; |
| 332 | } |
| 333 | |
| 334 | if (copy_to_user(buf, tmp, count)) { |
| 335 | ret = -EFAULT; |
| 336 | goto bail_tmp; |
| 337 | } |
| 338 | |
| 339 | *ppos = pos + count; |
| 340 | ret = count; |
| 341 | |
| 342 | bail_tmp: |
| 343 | kfree(tmp); |
| 344 | |
| 345 | bail: |
| 346 | return ret; |
| 347 | } |
| 348 | |
| 349 | static ssize_t flash_write(struct file *file, const char __user *buf, |
| 350 | size_t count, loff_t *ppos) |
| 351 | { |
| 352 | struct ipath_devdata *dd; |
| 353 | ssize_t ret; |
| 354 | loff_t pos; |
| 355 | char *tmp; |
| 356 | |
| 357 | pos = *ppos; |
| 358 | |
Bryan O'Sullivan | 7dae5bf | 2006-09-28 09:00:05 -0700 | [diff] [blame] | 359 | if (pos != 0) { |
Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 360 | ret = -EINVAL; |
| 361 | goto bail; |
| 362 | } |
| 363 | |
Bryan O'Sullivan | 7dae5bf | 2006-09-28 09:00:05 -0700 | [diff] [blame] | 364 | if (count != sizeof(struct ipath_flash)) { |
| 365 | ret = -EINVAL; |
Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 366 | goto bail; |
| 367 | } |
| 368 | |
Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 369 | tmp = kmalloc(count, GFP_KERNEL); |
| 370 | if (!tmp) { |
| 371 | ret = -ENOMEM; |
| 372 | goto bail; |
| 373 | } |
| 374 | |
| 375 | if (copy_from_user(tmp, buf, count)) { |
| 376 | ret = -EFAULT; |
| 377 | goto bail_tmp; |
| 378 | } |
| 379 | |
Theodore Ts'o | 8e18e29 | 2006-09-27 01:50:46 -0700 | [diff] [blame] | 380 | dd = file->f_dentry->d_inode->i_private; |
Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 381 | if (ipath_eeprom_write(dd, pos, tmp, count)) { |
| 382 | ret = -ENXIO; |
| 383 | ipath_dev_err(dd, "failed to write to flash\n"); |
| 384 | goto bail_tmp; |
| 385 | } |
| 386 | |
| 387 | *ppos = pos + count; |
| 388 | ret = count; |
| 389 | |
| 390 | bail_tmp: |
| 391 | kfree(tmp); |
| 392 | |
| 393 | bail: |
| 394 | return ret; |
| 395 | } |
| 396 | |
| 397 | static struct file_operations flash_ops = { |
| 398 | .read = flash_read, |
| 399 | .write = flash_write, |
| 400 | }; |
| 401 | |
| 402 | static int create_device_files(struct super_block *sb, |
| 403 | struct ipath_devdata *dd) |
| 404 | { |
| 405 | struct dentry *dir, *tmp; |
| 406 | char unit[10]; |
| 407 | int ret; |
| 408 | |
| 409 | snprintf(unit, sizeof unit, "%02d", dd->ipath_unit); |
| 410 | ret = create_file(unit, S_IFDIR|S_IRUGO|S_IXUGO, sb->s_root, &dir, |
| 411 | (struct file_operations *) &simple_dir_operations, |
| 412 | dd); |
| 413 | if (ret) { |
| 414 | printk(KERN_ERR "create_file(%s) failed: %d\n", unit, ret); |
| 415 | goto bail; |
| 416 | } |
| 417 | |
| 418 | ret = create_file("atomic_counters", S_IFREG|S_IRUGO, dir, &tmp, |
| 419 | &atomic_counters_ops, dd); |
| 420 | if (ret) { |
| 421 | printk(KERN_ERR "create_file(%s/atomic_counters) " |
| 422 | "failed: %d\n", unit, ret); |
| 423 | goto bail; |
| 424 | } |
| 425 | |
| 426 | ret = create_file("node_info", S_IFREG|S_IRUGO, dir, &tmp, |
| 427 | &atomic_node_info_ops, dd); |
| 428 | if (ret) { |
| 429 | printk(KERN_ERR "create_file(%s/node_info) " |
| 430 | "failed: %d\n", unit, ret); |
| 431 | goto bail; |
| 432 | } |
| 433 | |
| 434 | ret = create_file("port_info", S_IFREG|S_IRUGO, dir, &tmp, |
| 435 | &atomic_port_info_ops, dd); |
| 436 | if (ret) { |
| 437 | printk(KERN_ERR "create_file(%s/port_info) " |
| 438 | "failed: %d\n", unit, ret); |
| 439 | goto bail; |
| 440 | } |
| 441 | |
| 442 | ret = create_file("flash", S_IFREG|S_IWUSR|S_IRUGO, dir, &tmp, |
| 443 | &flash_ops, dd); |
| 444 | if (ret) { |
| 445 | printk(KERN_ERR "create_file(%s/flash) " |
| 446 | "failed: %d\n", unit, ret); |
| 447 | goto bail; |
| 448 | } |
| 449 | |
| 450 | bail: |
| 451 | return ret; |
| 452 | } |
| 453 | |
| 454 | static void remove_file(struct dentry *parent, char *name) |
| 455 | { |
| 456 | struct dentry *tmp; |
| 457 | |
| 458 | tmp = lookup_one_len(name, parent, strlen(name)); |
| 459 | |
| 460 | spin_lock(&dcache_lock); |
| 461 | spin_lock(&tmp->d_lock); |
| 462 | if (!(d_unhashed(tmp) && tmp->d_inode)) { |
| 463 | dget_locked(tmp); |
| 464 | __d_drop(tmp); |
| 465 | spin_unlock(&tmp->d_lock); |
| 466 | spin_unlock(&dcache_lock); |
| 467 | simple_unlink(parent->d_inode, tmp); |
| 468 | } else { |
| 469 | spin_unlock(&tmp->d_lock); |
| 470 | spin_unlock(&dcache_lock); |
| 471 | } |
| 472 | } |
| 473 | |
| 474 | static int remove_device_files(struct super_block *sb, |
| 475 | struct ipath_devdata *dd) |
| 476 | { |
| 477 | struct dentry *dir, *root; |
| 478 | char unit[10]; |
| 479 | int ret; |
| 480 | |
| 481 | root = dget(sb->s_root); |
| 482 | mutex_lock(&root->d_inode->i_mutex); |
| 483 | snprintf(unit, sizeof unit, "%02d", dd->ipath_unit); |
| 484 | dir = lookup_one_len(unit, root, strlen(unit)); |
| 485 | |
| 486 | if (IS_ERR(dir)) { |
| 487 | ret = PTR_ERR(dir); |
| 488 | printk(KERN_ERR "Lookup of %s failed\n", unit); |
| 489 | goto bail; |
| 490 | } |
| 491 | |
| 492 | remove_file(dir, "flash"); |
| 493 | remove_file(dir, "port_info"); |
| 494 | remove_file(dir, "node_info"); |
| 495 | remove_file(dir, "atomic_counters"); |
| 496 | d_delete(dir); |
| 497 | ret = simple_rmdir(root->d_inode, dir); |
| 498 | |
| 499 | bail: |
| 500 | mutex_unlock(&root->d_inode->i_mutex); |
| 501 | dput(root); |
| 502 | return ret; |
| 503 | } |
| 504 | |
| 505 | static int ipathfs_fill_super(struct super_block *sb, void *data, |
| 506 | int silent) |
| 507 | { |
| 508 | struct ipath_devdata *dd, *tmp; |
| 509 | unsigned long flags; |
| 510 | int ret; |
| 511 | |
| 512 | static struct tree_descr files[] = { |
| 513 | [1] = {"atomic_stats", &atomic_stats_ops, S_IRUGO}, |
| 514 | {""}, |
| 515 | }; |
| 516 | |
| 517 | ret = simple_fill_super(sb, IPATHFS_MAGIC, files); |
| 518 | if (ret) { |
| 519 | printk(KERN_ERR "simple_fill_super failed: %d\n", ret); |
| 520 | goto bail; |
| 521 | } |
| 522 | |
| 523 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 524 | |
| 525 | list_for_each_entry_safe(dd, tmp, &ipath_dev_list, ipath_list) { |
| 526 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 527 | ret = create_device_files(sb, dd); |
| 528 | if (ret) { |
| 529 | deactivate_super(sb); |
| 530 | goto bail; |
| 531 | } |
| 532 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 533 | } |
| 534 | |
| 535 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 536 | |
| 537 | bail: |
| 538 | return ret; |
| 539 | } |
| 540 | |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 541 | static int ipathfs_get_sb(struct file_system_type *fs_type, int flags, |
| 542 | const char *dev_name, void *data, struct vfsmount *mnt) |
Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 543 | { |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 544 | int ret = get_sb_single(fs_type, flags, data, |
| 545 | ipathfs_fill_super, mnt); |
| 546 | if (ret >= 0) |
| 547 | ipath_super = mnt->mnt_sb; |
| 548 | return ret; |
Bryan O'Sullivan | 3e9b4a5 | 2006-03-29 15:23:30 -0800 | [diff] [blame] | 549 | } |
| 550 | |
| 551 | static void ipathfs_kill_super(struct super_block *s) |
| 552 | { |
| 553 | kill_litter_super(s); |
| 554 | ipath_super = NULL; |
| 555 | } |
| 556 | |
| 557 | int ipathfs_add_device(struct ipath_devdata *dd) |
| 558 | { |
| 559 | int ret; |
| 560 | |
| 561 | if (ipath_super == NULL) { |
| 562 | ret = 0; |
| 563 | goto bail; |
| 564 | } |
| 565 | |
| 566 | ret = create_device_files(ipath_super, dd); |
| 567 | |
| 568 | bail: |
| 569 | return ret; |
| 570 | } |
| 571 | |
| 572 | int ipathfs_remove_device(struct ipath_devdata *dd) |
| 573 | { |
| 574 | int ret; |
| 575 | |
| 576 | if (ipath_super == NULL) { |
| 577 | ret = 0; |
| 578 | goto bail; |
| 579 | } |
| 580 | |
| 581 | ret = remove_device_files(ipath_super, dd); |
| 582 | |
| 583 | bail: |
| 584 | return ret; |
| 585 | } |
| 586 | |
| 587 | static struct file_system_type ipathfs_fs_type = { |
| 588 | .owner = THIS_MODULE, |
| 589 | .name = "ipathfs", |
| 590 | .get_sb = ipathfs_get_sb, |
| 591 | .kill_sb = ipathfs_kill_super, |
| 592 | }; |
| 593 | |
| 594 | int __init ipath_init_ipathfs(void) |
| 595 | { |
| 596 | return register_filesystem(&ipathfs_fs_type); |
| 597 | } |
| 598 | |
| 599 | void __exit ipath_exit_ipathfs(void) |
| 600 | { |
| 601 | unregister_filesystem(&ipathfs_fs_type); |
| 602 | } |